What is correct regarding multicasting and AOS-CX switches?

What is correct regarding multicasting and AOS-CX switches?
A . IGMP snooping is disabled, by default, on Layer-2 VLAN interfaces
B . IGMP query functions are enabled, by default, on Layer-2 VLAN interfaces
C . IGMP snooping is enabled, by default, on Layer-3 VLAN interfaces
D . IGMP-enabled AOS-CX switches flood unknown multicast destinations

View Answer

Answer: A